Re: how to get information on parport using char driver functions

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Dear Claudio Fiorini,

> > > i preferer do something like a real device driver, otherwise i never
> learn
> > > how to do that!
> > > Because if i use inb or outb i don't need to register nothing, those
> > > functions i use in user-space.
> >
> > I mean the inb in the kernel space only. Check it out pls...
> 
> Ok
> 
> >
> > Or u can straight away access those address using "read" kernel
> > API's. There are 8 bit read, 16 bit read(readw), etc,...
> >
> 
> can you show me a small example pls?

short int s;
s = readw(your_par_port_addr);

the definition for the readw for intel machine is
given in include/asm-i386/io.h

    142 #define readb(addr) (*(volatile unsigned char *) (addr))
    143 #define readw(addr) (*(volatile unsigned short *) (addr))
    144 #define readl(addr) (*(volatile unsigned int *) (addr))


Please correct me if I am wrong...



> 
> > Or if its memory mapped just access like a pointer. :-)


Regards,
Shine Mohamed Jabbar


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